This NiZn is our most popular ferrite for suppression of conducted EMI 
  from 20 MHz to 250 MHz.  This material is also used for inductive applications such 
  as high frequency common-mode chokes.  EMI suppression beads, beads on leads, SM beads, 
  multi-aperture cores, round cable EMI suppression cores, round cable snap-its, 
  flat cable EMI suppression cores, flat cable snap-its, miscellaneous suppression cores, 
  bobbins, and toroids are all available in 43 material.